Deviation Actions
The Arquilian Galaxy brings up a couple of interesting/legitimate questions: How did they even get a spiral galaxy to fit into such a small volume? And how much does it weigh?
Imagine a cloud of gas floating in outer space. If we wanted to compress it to fit it in a smaller space, we could do so, but at a certain point, the pressure in the core would be so great, nuclear fusion would occur. A star would be born. Interesting things happen when you compress stuff a lot. But we don't just want to compress a cloud of gas. We're talking about compressing an entire galaxy, and galaxies are massive. For example, our galaxy, the Milky Way, is 200,000 light-years across. It contains hundreds of billions of stars, and at least 100 billion planets. That is a lot of mass.
How much would all of that weigh? Well, it depends what you weigh it on. But it's mass...we're talking a mass equal to about 1.2 trillion solar masses. That's about 20 tredecillion kilograms. A big number. That much mass compressed into something the size of a ping-pong ball, you wouldn't have a nifty little tchotchke. No, you'd have a black hole. A black hole with a diameter of more than half a light-year. We would be inside it right now. The entire Earth would be sucked inside. Our solar system would be gone. But that's not happening right now, we're safe, because the laws of physics say doing so would pretty much be impossible, I think it's safe to say that a galaxy in your pocket is impossible. We have nothing to fear.
Or do we? An advanced alien civilization may be able to collapse a galaxy down to the size of a ping-pong ball without changing its shape, and without removing any of its mass. If aliens could do that with an entire galaxy, and fit it in a ping-pong ball, they may also be able to, at all times, access its energy. And how much energy is inside an entire galaxy? Every second, there's enough radiant energy from a galaxy to boil Earth's oceans...258.9 billion times.
I'd say it's a wise decision that the MIBs got that thing off of the planet, before those aliens, or that galaxy, destroy all life as we know it.